NETWORK DESIGN (CHAPTER 1)

NETWORK REQUIREMENTS

Simple management

Quick recover

Easy for troubleshooting

Timing of Application Response

GOAL

Scalability

Availability

Security

Manageability

Architecture

Flat Network Design

flat

Hierarchical Network Design

hierarchical

designed to reduce the number of routers and switches on a computer network by connecting the devices to a single switch instead of separate switches.

A hierarchical design is used to group devices into multiple networks

Hierarchical design model has three basic layers :

  1. Core layer
  1. Distribution layer
  1. Access layer

Cisco Enterprise

Used to further divide the three-layer hierarchical design into modular areas

Three areas of focus in modular network design :

  1. Enterprise campus

2.Server farm

  1. Enterprise edge

cisco

Methodology

STEP 1

Identify network requirement

STEP 2

Characterize existing network

STEP 3

Design the network topology and solution

Cisco Lifecycle Services

A six-phase approach (PPDIOO)

  1. Prepare phase
  1. Plan phase
  1. Design phase

4.Implement phase

  1. Operate phase
  1. Optimize phase

Approaches for network design

Top-Down

  • adapts the network infrastructure to the needs of the organisation.
  • The PPDIOO methodology uses the top-down approach.

Bottom-Up

  • A common approach
  • network designer selects network devices and technologies based on previous experience rather than prior understanding of the organisation.

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ZECHARIAH VIERI ANAK SARI

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